Makeup for a Woman in Mourning During the Thirty Days

Is it permissible for a woman to wear makeup during the thirty days of mourning?

There is no prohibition for a married woman or an adult who needs to get married to wear makeup during the thirty days, but a girl who is not of marriageable age should not wear makeup for thirty days.

As written in "Chochmat Adam" (Chapter 165, Paragraph 5): "Kichul and pircus are like ironing and haircuts, which are prohibited by law for all thirty days. However, it is permitted for a married woman, so she does not become unattractive to her husband, to apply kichul and pircus after seven days, like washing, according to the ruling of the Shulchan Aruch (Chapter 381), that all people are allowed to wash after seven days. But according to our custom, washing is prohibited even for a married woman (as evident from the words of the Rema there, Paragraph 5), and therefore it can be said that all the more so kichul and pircus would be prohibited. However, it seems that in this case, the prohibition was not instituted for a married woman (otherwise the Rema would have noted it). For in this case, it does not make sense to prohibit because of haircuts. A bride who experiences mourning within thirty days of her wedding is allowed to adorn herself even within seven days, as a bride needs more to be attractive to her husband. An adult who experiences mourning, since she is about to marry, is allowed to apply kichul and pircus but is prohibited from bathing in hot water for her entire body according to our custom for all thirty days. A girl in mourning is prohibited for all thirty days even in kichul and pircus, as she is not yet about to marry (there, Paragraph 6).